I'm curious if it should be possible to take a snapshot of a filesystem
sitting on top of CLVM (*not* a shared filesystem like GFS; something
like XFS or ext3, but still on a shared block device). I recall trying
it a couple weeks ago, and it failing miserably, but don't recall why,
and figured I'd ask if it should work before experimenting again.

If it should work, a few questions:
- Should I be able to create the snapshot on any node, or just the node
that is using the LV that I want to create a snapshot of?
- Is the syntax identical to normal linux snapshots?